Constant-pressure vertical liquid storage device with heat exchange function

Abstract

The utility model discloses a constant-pressure vertical liquid storage device with a heat exchange function, which comprises a vertically arranged liquid storage tank and a heat exchange coil pipe arranged in the liquid storage tank, the heat exchange coil pipe is positioned at the upper part of the liquid storage tank, the liquid storage tank is provided with a feed port, a liquid refrigerant or a gas refrigerant enters the liquid storage tank through the feed port, and the liquid refrigerant or the gas refrigerant enters the liquid storage tank through the heat exchange coil pipe. And the gaseous refrigerant and the liquid refrigerant are layered up and down in the liquid storage tank. On the basis of maintaining the temperature and pressure in the liquid storage tank, the problem that the temperature of the liquid refrigerant is too high is solved.

Description

Technical Field

[0001] The present application relates to the field of refrigerant storage equipment, and in particular to a constant pressure vertical liquid storage device with a heat exchange function. Background Art

[0002] Liquid storage tanks are mainly used to store liquids and gases. They can be used as transfer stations for liquid transportation or as storage equipment for gas. They have high sealing and stability.

[0003] In the related art, a heat exchange coil is installed inside the horizontal liquid accumulator. The heat exchange coil is arranged in the middle and lower part of the liquid storage tank of the liquid accumulator, and the liquid supply port is at the bottom. The liquid supply port can be connected with the liquid inlet of the evaporator and other equipment to ensure that the evaporator has sufficient refrigerant supply. The air inlet and air outlet of the heat exchange coil are both arranged at the top. The heat exchange coil can be fed with high-temperature and high-pressure gas. The temperature and pressure in the liquid storage tank can be maintained by heating the heat exchange coil.

[0004] Regarding the above-mentioned related technologies, the applicant believes that the following defects exist: the heat exchange coil also has a heating effect on the liquid refrigerant at the bottom of the horizontal liquid storage tank, which will cause the temperature of the liquid refrigerant to be too high and the refrigeration performance coefficient COP of the system to be reduced, so there is still room for improvement. Summary of the invention

[0005] In order to improve the problem of high temperature of liquid refrigerant on the basis of maintaining the temperature and pressure in the liquid storage tank, the present application provides a constant pressure vertical liquid storage tank with heat exchange function.

[0006] The present application provides a constant pressure vertical liquid storage device with heat exchange function, which adopts the following technical solution:

[0007] A constant pressure vertical liquid storage device with heat exchange function comprises a vertically arranged liquid storage tank and a heat exchange coil arranged in the liquid storage tank. The liquid storage tank is provided with a feed inlet, and liquid refrigerant or gaseous refrigerant enters the liquid storage tank through the feed inlet. The gaseous refrigerant and the liquid refrigerant are layered up and down in the liquid storage tank, and the heat exchange coil is located at the upper position of the liquid storage tank.

[0008] By adopting the above technical solution, the vertical liquid storage tank divides the refrigerant gas and liquid into upper and lower layers. Since the heat exchange coil is located at the upper part of the liquid storage tank, the high pressure in the liquid storage tank is maintained by heat exchange between the gaseous refrigerant in the liquid storage tank and the heat exchange coil. When defrosting or thawing, it can provide stable high-temperature and high-pressure gas, and the pressure in the liquid storage tank will not be reduced due to heat supply to low pressure, thereby causing the refrigerant liquid in the liquid storage tank to evaporate and absorb heat to cause internal consumption. By increasing the distance between the liquid refrigerant and the heat exchange coil, the influence of the heat exchange coil on the liquid refrigerant at the bottom of the liquid storage tank is reduced, and the situation of reducing the COP of the refrigeration system due to additional heating of the refrigerant liquid is reduced, which is conducive to improving the problem of high liquid refrigerant temperature on the basis of maintaining the temperature and pressure in the liquid storage tank. In addition, compared with the horizontal liquid storage tank, by setting the liquid storage tank upright, the volume of hot gas stored in the liquid storage tank can be increased while maintaining the same height of the liquid level, and the heating time of the heat exchange coil can be shortened while avoiding direct heating of the liquid refrigerant, which is conducive to reducing equipment energy consumption.

[0009] Preferably, an air outlet is provided on the top of the liquid storage tank, and the air outlet end of the heat exchange coil is connected to the air outlet. An air inlet is provided on the side of the liquid storage tank, and the air inlet end of the heat exchange coil is connected to the air inlet. The axis of the heat exchange coil coincides with the axis of the liquid storage tank.

[0010] By adopting the above technical solution, the traditional transportation pipeline is changed, which is conducive to the stable transportation of high-temperature and high-pressure gas from bottom to top through the heat exchange coil.

[0011] Preferably, a heat supply port is provided on the side of the liquid storage tank, and a lead pipe connected to the heat supply port is provided in the liquid storage tank, and one end of the lead pipe away from the heat supply port extends to the upper position of the liquid storage tank, and the gaseous refrigerant in the liquid storage tank passes through the lead pipe and is discharged from the heat supply port.

[0012] By adopting the above technical solution, the lead pipe is extended to the upper position of the liquid storage tank so that the gaseous refrigerant gas is heated by the heat exchange coil and then supplied to the evaporator under the guidance of the lead pipe, thereby providing stable high-temperature and high-pressure gas during de-icing or defrosting.

[0013] Preferably, the ratio of the height dimension of the liquid storage tank to the diameter dimension of the liquid storage tank is in the range of 2.0 to 3.0.

[0014] By adopting the above technical solution, the height and diameter ratio of the liquid storage tank is controlled between 2.0 and 3.0, so that the volume of the liquid storage tank is within a reasonable range, the distance between the heat exchange coil and the liquid refrigerant is increased, and more liquid refrigerant can be stored.

[0015] Preferably, a plurality of sight glasses are provided on the side of the liquid storage tank, and the plurality of sight glasses are distributed along the height direction of the liquid storage tank.

[0016] By adopting the above technical solution, the staff can observe the liquid level in the liquid storage tank through the sight glass, so as to control the inflow and outflow of the liquid refrigerant in the liquid storage tank according to the liquid level.

[0017] Preferably, a safety valve interface is provided on the top of the liquid storage tank.

[0018] By adopting the above technical solution, a safety valve can be installed on the top of the liquid storage tank to keep the pressure in the liquid storage tank within the allowable pressure range, thereby playing a role of safety protection.

[0019] Preferably, a pressure gauge interface is provided on the top of the liquid storage tank.

[0020] By adopting the above technical solution, the internal pressure value of the liquid storage tank can be monitored by a pressure gauge, so that the staff can intuitively know the pressure conditions inside the liquid storage tank.

[0021] In summary, the present application includes at least one of the following beneficial technical effects:

[0022] 1. By adopting a vertical liquid storage tank, the gaseous refrigerant and liquid refrigerant are layered up and down, and the heat exchange coil is located at the upper part of the liquid storage tank. The heat exchange between the gaseous refrigerant in the liquid storage tank and the heat exchange coil maintains the high pressure in the liquid storage tank, and the impact on the liquid refrigerant at the bottom of the liquid storage tank is minimized. The refrigerant liquid will not be additionally heated, thereby reducing the COP of the refrigeration system. It is beneficial to improve the problem of high liquid refrigerant temperature on the basis of maintaining the temperature and pressure in the liquid storage tank;

[0023] 2. Compared with the traditional horizontal liquid receiver with heat exchange function, the vertical liquid receiver with heat exchange coil can hold a larger amount of refrigerant gas in the liquid receiver while maintaining the same liquid level height, and the demand for compressor exhaust volume is smaller. The compressor can operate at reduced load, reducing the energy consumption of the system. Even after an abnormal shutdown, the high-pressure gas in the liquid receiver can be used to remove ice and defrost without starting the compressor, so that the refrigeration equipment can operate normally after it is restarted;

[0024] 3. By controlling the ratio of the height of the liquid storage tank to the diameter of the liquid storage tank within a range of 2.0 to 3.0, the volume of the liquid storage tank is within a reasonable range, the distance between the heat exchange coil and the liquid refrigerant is increased, and more liquid refrigerant can be stored. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the internal structure of a constant pressure vertical liquid storage tank with heat exchange function according to an embodiment of the present application.

[0026] Explanation of the reference numerals in the accompanying drawings: 1. Liquid storage tank; 12. Heating port; 13. Feed port; 14. Air inlet; 15. Pressure gauge interface; 16. Air outlet; 17. Safety valve interface; 18. Liquid supply port; 19. Mounting plate; 191. Mounting hole; 2. Heat exchange coil; 21. Air inlet end; 22. Air outlet end; 3. Sight glass. DETAILED DESCRIPTION

[0027] The following is combined with Figure 1 This application is described in further detail.

[0028] The present application embodiment discloses a constant pressure vertical liquid storage device with heat exchange function. Figure 1 , including a liquid storage tank 1 arranged upright and a heat exchange coil 2 arranged in the liquid storage tank 1. The ratio of the height dimension of the liquid storage tank 1 to the diameter dimension of the liquid storage tank 1 is between 2.0 and 3.0. The interior of the liquid storage tank 1 is divided into three equal parts along its own height direction: upper, middle and lower. A feed port 13 is installed in the middle position of the side of the liquid storage tank 1. Liquid refrigerant or gaseous refrigerant enters the liquid storage tank 1 through the feed port 13 to store the gaseous refrigerant and the liquid refrigerant. The gaseous refrigerant and the liquid refrigerant are layered in the upper and lower parts of the liquid storage tank 1.

[0029] The heat exchange coil 2 is located at the upper part of the liquid storage tank 1, and an air outlet 16 is provided at the middle of the top of the liquid storage tank 1. The air outlet end 22 of the heat exchange coil 2 is connected to the air outlet 16. The side of the liquid storage tank 1 is provided with an air inlet 14. The air inlet end 21 of the heat exchange coil 2 is connected to the air inlet 14, and the air inlet 14 is located higher than the feed port 13. In addition, the heat exchange coil 2 is spirally arranged close to the inner circumferential wall of the liquid storage tank 1, and the axis of the heat exchange coil 2 coincides with the axis of the liquid storage tank 1.

[0030] The high-temperature and high-pressure gas enters the heat exchange coil 2 through the air inlet 14 and is discharged from the liquid storage tank 1 from the air outlet 16. The high-temperature and high-pressure gas is transported stably from bottom to top in a spiral shape under the guidance of the heat exchange coil 2, and the high pressure in the liquid storage tank is maintained by the heat exchange between the gaseous refrigerant in the liquid storage tank 1 and the heat exchange coil 2.

[0031] A heat supply port 12 is provided on the side of the liquid storage tank 1, and the position of the heat supply port 12 is lower than the feed port 13. A lead pipe connected to the heat supply port 12 is installed in the liquid storage tank 1, and one end of the lead pipe away from the heat supply port 12 vertically extends upward to the upper position of the liquid storage tank 1, and the gaseous refrigerant in the liquid storage tank 1 passes through the lead pipe and is discharged from the heat supply port 12. A liquid supply port 18 is provided at the bottom of the liquid storage tank 1, and the liquid refrigerant is discharged from the liquid storage tank 1 from the liquid supply port 18.

[0032] One end of the lead pipe away from the heat supply port 12 extends to the inner side of the heat exchange coil 2, so that the two are staggered. In addition, in order to improve the stability of the heat exchange coil 2 and the lead pipe in the liquid storage tank 1, a vertically arranged mounting plate 19 is fixed to the inner wall of the liquid storage tank 1. The mounting plate 19 is provided with a plurality of mounting holes 191, and the plurality of mounting holes 191 are evenly spaced along the vertical direction. The heat exchange coil 2 passes through the plurality of mounting holes 191 in sequence. In addition, the side of the mounting plate 19 away from the inner wall of the liquid storage tank 1 is fixedly connected to the outer wall of the lead pipe, thereby fixing the heat exchange coil 2 and the lead pipe at the same time.

[0033] A plurality of sight glasses 3 are installed on the side of the liquid storage tank 1, and the plurality of sight glasses 3 are distributed along the height direction of the liquid storage tank 1. The staff can observe the liquid level in the liquid storage tank 1 through the sight glasses 3, so as to control the inlet and outlet of the liquid refrigerant in the liquid storage tank 1 according to the liquid level.

[0034] A safety valve interface 17 and a pressure gauge interface 15 are provided on the top of the liquid storage tank 1, which facilitates the installation of the safety valve and the pressure gauge on the top of the liquid storage tank 1, so that the pressure in the liquid storage tank 1 is maintained within the allowable pressure range, thereby playing a role in safety protection.

[0035] The implementation principle of a constant-pressure vertical liquid storage device with a heat exchange function in an embodiment of the present application is as follows: the high pressure in the liquid storage tank is maintained by heat exchange between the gaseous refrigerant in the liquid storage tank 1 and the heat exchange coil 2, and during de-icing or defrosting, the gaseous refrigerant in the liquid storage tank 1 is input into the evaporator through the heat supply port 12, thereby providing a stable high-temperature and high-pressure gas, and the pressure in the liquid storage tank 1 will not be reduced due to heat supply to a low pressure, thereby causing the refrigerant liquid in the liquid storage tank 1 to evaporate and absorb heat to cause internal consumption. Moreover, the liquid storage tank 1 with a vertical structure is combined with the heat exchange coil 2, which can reduce the influence of the heat exchange coil 2 on the liquid refrigerant at the bottom of the liquid storage tank 1 by increasing the distance between the liquid refrigerant and the heat exchange coil 2, and reduce the situation where the COP of the refrigeration system is reduced due to additional heating of the refrigerant liquid, which is beneficial to improving the problem of high temperature of the liquid refrigerant on the basis of maintaining the temperature and pressure in the liquid storage tank 1. Compared with a horizontal liquid storage tank 1, a vertical liquid storage tank 1 combined with a heat exchange coil 2 can increase the volume of hot gas stored in the liquid storage tank 1 while maintaining the same liquid level. In addition, while avoiding direct heating of the liquid refrigerant, the heating time of the heat exchange coil 2 can be shortened, which is beneficial to reducing equipment energy consumption.

[0036] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A constant pressure vertical liquid storage tank with heat exchange function, characterized in that: The invention comprises a liquid storage tank (1) arranged upright and a heat exchange coil (2) arranged in the liquid storage tank (1), wherein the liquid storage tank (1) is provided with a feed port (13), and liquid refrigerant or gaseous refrigerant enters the liquid storage tank (1) through the feed port (13), and the gaseous refrigerant and the liquid refrigerant are layered in the liquid storage tank (1), and the heat exchange coil (2) is located at an upper position of the liquid storage tank (1).

2. A constant pressure vertical liquid storage device with heat exchange function according to claim 1, characterized in that: The top of the liquid storage tank (1) is provided with an air outlet (16), and the air outlet end (22) of the heat exchange coil (2) is connected to the air outlet (16); the side of the liquid storage tank (1) is provided with an air inlet (14), and the air inlet end (21) of the heat exchange coil (2) is connected to the air inlet (14); the axis around which the heat exchange coil (2) is circumferentially coincides with the axis of the liquid storage tank (1).

3. The constant pressure vertical liquid storage device with heat exchange function according to claim 1, characterized in that: A heat supply port (12) is provided on the side of the liquid storage tank (1), and a guide pipe connected to the heat supply port (12) is provided inside the liquid storage tank (1), and one end of the guide pipe away from the heat supply port (12) extends to the upper position of the liquid storage tank (1), and the gaseous refrigerant in the liquid storage tank (1) passes through the guide pipe and is discharged from the heat supply port (12).

4. The constant pressure vertical liquid storage device with heat exchange function according to claim 1, characterized in that: The ratio of the height dimension of the liquid storage tank (1) to the diameter dimension of the liquid storage tank (1) is in the range of 2.0 to 3.

0.

5. The constant pressure vertical liquid storage device with heat exchange function according to claim 1, characterized in that: A plurality of sight glasses (3) are arranged on the side of the liquid storage tank (1), and the plurality of sight glasses (3) are distributed along the height direction of the liquid storage tank (1).

6. The constant pressure vertical liquid storage device with heat exchange function according to claim 1, characterized in that: The bottom of the liquid storage tank (1) is provided with a liquid supply port (18), and the liquid refrigerant is discharged from the liquid storage tank (1) through the liquid supply port (18).

7. The constant pressure vertical liquid storage device with heat exchange function according to claim 1, characterized in that: A safety valve interface (17) is provided on the top of the liquid storage tank (1).

8. The constant pressure vertical liquid storage device with heat exchange function according to claim 1, characterized in that: A pressure gauge interface (15) is provided on the top of the liquid storage tank (1).

Images